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FAILED: patch "[PATCH] tracing: Fix fixed array of synthetic event" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 47ef834209e5981f443240d8a8b45bf680df22aa # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025122942-dwelling-spelling-4707@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 47ef834209e5981f443240d8a8b45bf680df22aa Mon Sep 17 00:00:00 2001 From: Steven Rostedt <rostedt(a)goodmis.org> Date: Thu, 4 Dec 2025 15:19:35 -0500 Subject: [PATCH] tracing: Fix fixed array of synthetic event The commit 4d38328eb442d ("tracing: Fix synth event printk format for str fields") replaced "%.*s" with "%s" but missed removing the number size of the dynamic and static strings. The commit e1a453a57bc7 ("tracing: Do not add length to print format in synthetic events") fixed the dynamic part but did not fix the static part. That is, with the commands: # echo 's:wake_lat char[] wakee; u64 delta;' >> /sys/kernel/tracing/dynamic_events # echo 'hist:keys=pid:ts=common_timestamp.usecs if !(common_flags & 0x18)' > /sys/kernel/tracing/events/sched/sched_waking/trigger # echo 'hist:keys=next_pid:delta=common_timestamp.usecs-$ts:onmatch(sched.sched_waking).trace(wake_lat,next_comm,$delta)' > /sys/kernel/tracing/events/sched/sched_switch/trigger That caused the output of: <idle>-0 [001] d..5. 193.428167: wake_lat: wakee=(efault)sshd-sessiondelta=155 sshd-session-879 [001] d..5. 193.811080: wake_lat: wakee=(efault)kworker/u34:5delta=58 <idle>-0 [002] d..5. 193.811198: wake_lat: wakee=(efault)bashdelta=91 The commit e1a453a57bc7 fixed the part where the synthetic event had "char[] wakee". But if one were to replace that with a static size string: # echo 's:wake_lat char[16] wakee; u64 delta;' >> /sys/kernel/tracing/dynamic_events Where "wakee" is defined as "char[16]" and not "char[]" making it a static size, the code triggered the "(efaul)" again. Remove the added STR_VAR_LEN_MAX size as the string is still going to be nul terminated. Cc: stable(a)vger.kernel.org Cc: Masami Hiramatsu <mhiramat(a)kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> Cc: Douglas Raillard <douglas.raillard(a)arm.com> Link: https://patch.msgid.link/20251204151935.5fa30355@gandalf.local.home Fixes: e1a453a57bc7 ("tracing: Do not add length to print format in synthetic events") Signed-off-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> diff --git a/kernel/trace/trace_events_synth.c b/kernel/trace/trace_events_synth.c index 2f19bbe73d27..4554c458b78c 100644 --- a/kernel/trace/trace_events_synth.c +++ b/kernel/trace/trace_events_synth.c @@ -375,7 +375,6 @@ static enum print_line_t print_synth_event(struct trace_iterator *iter, n_u64++; } else { trace_seq_printf(s, print_fmt, se->fields[i]->name, - STR_VAR_LEN_MAX, (char *)&entry->fields[n_u64].as_u64, i == se->n_fields - 1 ? "" : " "); n_u64 += STR_VAR_LEN_MAX / sizeof(u64);

1 week, 1 day

FAILED: patch "[PATCH] tracing: Fix fixed array of synthetic event" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 47ef834209e5981f443240d8a8b45bf680df22aa # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025122941-citric-sushi-4f65@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 47ef834209e5981f443240d8a8b45bf680df22aa Mon Sep 17 00:00:00 2001 From: Steven Rostedt <rostedt(a)goodmis.org> Date: Thu, 4 Dec 2025 15:19:35 -0500 Subject: [PATCH] tracing: Fix fixed array of synthetic event The commit 4d38328eb442d ("tracing: Fix synth event printk format for str fields") replaced "%.*s" with "%s" but missed removing the number size of the dynamic and static strings. The commit e1a453a57bc7 ("tracing: Do not add length to print format in synthetic events") fixed the dynamic part but did not fix the static part. That is, with the commands: # echo 's:wake_lat char[] wakee; u64 delta;' >> /sys/kernel/tracing/dynamic_events # echo 'hist:keys=pid:ts=common_timestamp.usecs if !(common_flags & 0x18)' > /sys/kernel/tracing/events/sched/sched_waking/trigger # echo 'hist:keys=next_pid:delta=common_timestamp.usecs-$ts:onmatch(sched.sched_waking).trace(wake_lat,next_comm,$delta)' > /sys/kernel/tracing/events/sched/sched_switch/trigger That caused the output of: <idle>-0 [001] d..5. 193.428167: wake_lat: wakee=(efault)sshd-sessiondelta=155 sshd-session-879 [001] d..5. 193.811080: wake_lat: wakee=(efault)kworker/u34:5delta=58 <idle>-0 [002] d..5. 193.811198: wake_lat: wakee=(efault)bashdelta=91 The commit e1a453a57bc7 fixed the part where the synthetic event had "char[] wakee". But if one were to replace that with a static size string: # echo 's:wake_lat char[16] wakee; u64 delta;' >> /sys/kernel/tracing/dynamic_events Where "wakee" is defined as "char[16]" and not "char[]" making it a static size, the code triggered the "(efaul)" again. Remove the added STR_VAR_LEN_MAX size as the string is still going to be nul terminated. Cc: stable(a)vger.kernel.org Cc: Masami Hiramatsu <mhiramat(a)kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> Cc: Douglas Raillard <douglas.raillard(a)arm.com> Link: https://patch.msgid.link/20251204151935.5fa30355@gandalf.local.home Fixes: e1a453a57bc7 ("tracing: Do not add length to print format in synthetic events") Signed-off-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> diff --git a/kernel/trace/trace_events_synth.c b/kernel/trace/trace_events_synth.c index 2f19bbe73d27..4554c458b78c 100644 --- a/kernel/trace/trace_events_synth.c +++ b/kernel/trace/trace_events_synth.c @@ -375,7 +375,6 @@ static enum print_line_t print_synth_event(struct trace_iterator *iter, n_u64++; } else { trace_seq_printf(s, print_fmt, se->fields[i]->name, - STR_VAR_LEN_MAX, (char *)&entry->fields[n_u64].as_u64, i == se->n_fields - 1 ? "" : " "); n_u64 += STR_VAR_LEN_MAX / sizeof(u64);

1 week, 1 day

[6.12.60 lts] [amdgpu]: regression: broken multi-monitor USB4 dock on Ryzen 7840U

by Péter Bohner

upgrading from 6.12.59 to 6.12.60 broke my USB4 (Dynabook Thunderbolt 4 Dock)'s video output with my Framework 13 (AMD Ryzen 7840U / Radeom 780M igpu) . With two monitors plugged in, only one of them works, the other (always the one on the 'video 2' output) remains blank (but receives signal). relevant dmesg [note: tainted by ZFS] (full output at: https://gist.github.com/x-zvf/128d45d028230438b8777c40759fa997): [drm:amdgpu_dm_process_dmub_aux_transfer_sync [amdgpu]] *ERROR* wait_for_completion_timeout timeout! ------------[ cut here ]------------ WARNING: CPU: 15 PID: 3064 at drivers/gpu/drm/amd/amdgpu/../display/dc/link/hwss/link_hwss_dpia.c:49 update_dpia_stream_allocation_table+0xf2/0x100 [amdgpu] Modules linked in: hid_logitech_hidpp hid_logitech_dj snd_seq_midi snd_seq_midi_event uvcvideo videobuf2_vmalloc uvc videobuf2_memops snd_usb_audio videobuf2_v4l2 videobuf2_common snd_usbmidi_lib snd_ump videodev snd_rawmidi mc cdc_ether usbnet mii uas usb_storage ccm snd_seq_dummy rfcomm snd_hrtimer snd_seq snd_seq_device tun ip6t_REJECT nf_reject_ipv6 ipt_REJECT nf_reject_ipv4 xt_multiport xt_cgroup xt_mark xt_owner xt_tcpudp ip6table_raw iptable_raw ip6table_mangle iptable_mangle ip6table_nat iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 libcrc32c crc32c_generic ip6table_filter ip6_tables iptable_filter uhid cmac algif_hash algif_skcipher af_alg bnep vfat fat amd_atl intel_rapl_msr intel_rapl_common snd_sof_amd_acp70 snd_sof_amd_acp63 snd_soc_acpi_amd_match snd_sof_amd_vangogh snd_sof_amd_rembrandt snd_sof_amd_renoir snd_sof_amd_acp snd_sof_pci snd_sof_xtensa_dsp snd_sof mt7921e snd_sof_utils mt7921_common snd_pci_ps mt792x_lib snd_hda_codec_realtek snd_amd_sdw_acpi soundwire_amd kvm_amd mt76_connac_lib snd_hda_codec_generic soundwire_generic_allocation snd_hda_scodec_component snd_hda_codec_hdmi mousedev mt76 soundwire_bus snd_hda_intel kvm snd_soc_core snd_intel_dspcfg irqbypass snd_intel_sdw_acpi mac80211 snd_compress ac97_bus crct10dif_pclmul hid_sensor_als snd_pcm_dmaengine snd_hda_codec crc32_pclmul hid_sensor_trigger crc32c_intel snd_rpl_pci_acp6x industrialio_triggered_buffer snd_acp_pci polyval_clmulni kfifo_buf snd_hda_core snd_acp_legacy_common polyval_generic libarc4 hid_sensor_iio_common industrialio ghash_clmulni_intel leds_cros_ec cros_ec_sysfs cros_ec_hwmon cros_kbd_led_backlight cros_charge_control led_class_multicolor gpio_cros_ec cros_ec_chardev cros_ec_debugfs sha512_ssse3 snd_hwdep snd_pci_acp6x hid_multitouch joydev spd5118 hid_sensor_hub cros_ec_dev sha256_ssse3 snd_pcm btusb cfg80211 sha1_ssse3 btrtl aesni_intel snd_pci_acp5x btintel snd_timer snd_rn_pci_acp3x sp5100_tco gf128mul ucsi_acpi crypto_simd btbcm snd_acp_config snd amd_pmf typec_ucsi cryptd snd_soc_acpi i2c_piix4 btmtk bluetooth rapl wmi_bmof pcspkr typec k10temp thunderbolt amdtee soundcore ccp snd_pci_acp3x i2c_smbus rfkill roles cros_ec_lpcs i2c_hid_acpi amd_sfh cros_ec platform_profile i2c_hid tee amd_pmc mac_hid i2c_dev crypto_user dm_mod loop nfnetlink bpf_preload ip_tables x_tables hid_generic usbhid amdgpu zfs(POE) crc16 amdxcp spl(OE) i2c_algo_bit drm_ttm_helper ttm serio_raw drm_exec atkbd gpu_sched libps2 vivaldi_fmap drm_suballoc_helper nvme drm_buddy i8042 drm_display_helper nvme_core video serio cec nvme_auth wmi CPU: 15 UID: 1000 PID: 3064 Comm: kwin_wayland Tainted: P OE 6.12.60-1-lts #1 9b11292f14ae477e878a6bb6a5b5efc27ccf021d Tainted: [P]=PROPRIETARY_MODULE, [O]=OOT_MODULE, [E]=UNSIGNED_MODULE Hardware name: Framework Laptop 13 (AMD Ryzen 7040Series)/FRANMDCP07, BIOS 03.16 07/25/2025 RIP: 0010:update_dpia_stream_allocation_table+0xf2/0x100 [amdgpu] Code: d0 0f 1f 00 48 8b 44 24 08 65 48 2b 04 25 28 00 00 00 75 1a 48 83 c4 10 5b 5d 41 5c 41 5d e9 10 ec e3 d9 31 db e9 6f ff ff ff <0f> 0b eb 8a e8 05 09 c3 d9 0f 1f 44 00 00 90 90 90 90 90 90 90 90 RSP: 0018:ffffd26fe3473248 EFLAGS: 00010282 RAX: 00000000ffffffff RBX: 0000000000000025 RCX: 0000000000001140 RDX: 00000000ffffffff RSI: ffffd26fe34731f0 RDI: ffff8bb78c7bb608 RBP: ffff8bb7982c3b88 R08: 00000000ffffffff R09: 0000000000001100 R10: ffffd27000ef9900 R11: ffff8bb78c7bb400 R12: ffff8bb7982ed600 R13: ffff8bb7982c3800 R14: ffff8bb984e402a8 R15: ffff8bb7982c38c8 FS: 000073883c086b80(0000) GS:ffff8bc51e180000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002020005ba004 CR3: 000000014396e000 CR4: 0000000000f50ef0 PKRU: 55555554 Call Trace: <TASK> ? link_set_dpms_on+0x7a5/0xc70 [amdgpu d75f7e51e39957084964278ab74da83065554c01] link_set_dpms_on+0x806/0xc70 [amdgpu d75f7e51e39957084964278ab74da83065554c01] dce110_apply_single_controller_ctx_to_hw+0x300/0x480 [amdgpu d75f7e51e39957084964278ab74da83065554c01] dce110_apply_ctx_to_hw+0x24c/0x2e0 [amdgpu d75f7e51e39957084964278ab74da83065554c01] ? dcn10_setup_stereo+0x160/0x170 [amdgpu d75f7e51e39957084964278ab74da83065554c01] dc_commit_state_no_check+0x63d/0xeb0 [amdgpu d75f7e51e39957084964278ab74da83065554c01] dc_commit_streams+0x296/0x490 [amdgpu d75f7e51e39957084964278ab74da83065554c01] ? srso_alias_return_thunk+0x5/0xfbef5 ? schedule_timeout+0x133/0x170 amdgpu_dm_atomic_commit_tail+0x6a1/0x3a10 [amdgpu d75f7e51e39957084964278ab74da83065554c01] ? srso_alias_return_thunk+0x5/0xfbef5 ? psi_task_switch+0x113/0x2a0 ? srso_alias_return_thunk+0x5/0xfbef5 ? srso_alias_return_thunk+0x5/0xfbef5 ? srso_alias_return_thunk+0x5/0xfbef5 ? schedule+0x27/0xf0 ? srso_alias_return_thunk+0x5/0xfbef5 ? schedule_timeout+0x133/0x170 ? srso_alias_return_thunk+0x5/0xfbef5 ? dma_fence_default_wait+0x8b/0x230 ? srso_alias_return_thunk+0x5/0xfbef5 ? srso_alias_return_thunk+0x5/0xfbef5 ? wait_for_completion_timeout+0x12e/0x180 commit_tail+0xae/0x140 drm_atomic_helper_commit+0x13c/0x180 drm_atomic_commit+0xa6/0xe0 ? __pfx___drm_printfn_info+0x10/0x10 drm_mode_atomic_ioctl+0xa60/0xcd0 ? sock_poll+0x51/0x110 ? __pfx_drm_mode_atomic_ioctl+0x10/0x10 drm_ioctl_kernel+0xad/0x100 drm_ioctl+0x286/0x500 ? __pfx_drm_mode_atomic_ioctl+0x10/0x10 amdgpu_drm_ioctl+0x4a/0x80 [amdgpu d75f7e51e39957084964278ab74da83065554c01] __x64_sys_ioctl+0x91/0xd0 do_syscall_64+0x7b/0x190 ? srso_alias_return_thunk+0x5/0xfbef5 ? __x64_sys_ppoll+0xf8/0x180 ? srso_alias_return_thunk+0x5/0xfbef5 ? syscall_exit_to_user_mode+0x37/0x1c0 ? srso_alias_return_thunk+0x5/0xfbef5 ? do_syscall_64+0x87/0x190 ? srso_alias_return_thunk+0x5/0xfbef5 ? do_syscall_64+0x87/0x190 ? srso_alias_return_thunk+0x5/0xfbef5 ? do_syscall_64+0x87/0x190 ? srso_alias_return_thunk+0x5/0xfbef5 ? do_syscall_64+0x87/0x190 ? srso_alias_return_thunk+0x5/0xfbef5 ? do_syscall_64+0x87/0x190 ? srso_alias_return_thunk+0x5/0xfbef5 ? irqentry_exit_to_user_mode+0x2c/0x1b0 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x738842d9b70d Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00 RSP: 002b:00007ffe3c7ed230 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000634abd49c210 RCX: 0000738842d9b70d RDX: 00007ffe3c7ed320 RSI: 00000000c03864bc RDI: 0000000000000013 RBP: 00007ffe3c7ed280 R08: 0000634abc4049bc R09: 0000634abce43e80 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe3c7ed320 R13: 00000000c03864bc R14: 0000000000000013 R15: 0000634abc404840 </TASK> ---[ end trace 0000000000000000 ]--- regards, ~ Peter

1 week, 1 day

FAILED: patch "[PATCH] io_uring: fix filename leak in __io_openat_prep()" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x b14fad555302a2104948feaff70503b64c80ac01 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025122931-palm-unfixed-3968@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From b14fad555302a2104948feaff70503b64c80ac01 Mon Sep 17 00:00:00 2001 From: Prithvi Tambewagh <activprithvi(a)gmail.com> Date: Thu, 25 Dec 2025 12:58:29 +0530 Subject: [PATCH] io_uring: fix filename leak in __io_openat_prep() __io_openat_prep() allocates a struct filename using getname(). However, for the condition of the file being installed in the fixed file table as well as having O_CLOEXEC flag set, the function returns early. At that point, the request doesn't have REQ_F_NEED_CLEANUP flag set. Due to this, the memory for the newly allocated struct filename is not cleaned up, causing a memory leak. Fix this by setting the REQ_F_NEED_CLEANUP for the request just after the successful getname() call, so that when the request is torn down, the filename will be cleaned up, along with other resources needing cleanup. Reported-by: syzbot+00e61c43eb5e4740438f(a)syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=00e61c43eb5e4740438f Tested-by: syzbot+00e61c43eb5e4740438f(a)syzkaller.appspotmail.com Cc: stable(a)vger.kernel.org Signed-off-by: Prithvi Tambewagh <activprithvi(a)gmail.com> Fixes: b9445598d8c6 ("io_uring: openat directly into fixed fd table") Signed-off-by: Jens Axboe <axboe(a)kernel.dk> diff --git a/io_uring/openclose.c b/io_uring/openclose.c index bfeb91b31bba..15dde9bd6ff6 100644 --- a/io_uring/openclose.c +++ b/io_uring/openclose.c @@ -73,13 +73,13 @@ static int __io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe open->filename = NULL; return ret; } + req->flags |= REQ_F_NEED_CLEANUP; open->file_slot = READ_ONCE(sqe->file_index); if (open->file_slot && (open->how.flags & O_CLOEXEC)) return -EINVAL; open->nofile = rlimit(RLIMIT_NOFILE); - req->flags |= REQ_F_NEED_CLEANUP; if (io_openat_force_async(open)) req->flags |= REQ_F_FORCE_ASYNC; return 0;

1 week, 1 day

FAILED: patch "[PATCH] io_uring: fix min_wait wakeups for SQPOLL" failed to apply to 6.12-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.12-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y git checkout FETCH_HEAD git cherry-pick -x e15cb2200b934e507273510ba6bc747d5cde24a3 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025122915-sensually-wasting-f5f8@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From e15cb2200b934e507273510ba6bc747d5cde24a3 Mon Sep 17 00:00:00 2001 From: Jens Axboe <axboe(a)kernel.dk> Date: Tue, 9 Dec 2025 13:25:23 -0700 Subject: [PATCH] io_uring: fix min_wait wakeups for SQPOLL Using min_wait, two timeouts are given: 1) The min_wait timeout, within which up to 'wait_nr' events are waited for. 2) The overall long timeout, which is entered if no events are generated in the min_wait window. If the min_wait has expired, any event being posted must wake the task. For SQPOLL, that isn't the case, as it won't trigger the io_has_work() condition, as it will have already processed the task_work that happened when an event was posted. This causes any event to trigger post the min_wait to not always cause the waiting application to wakeup, and instead it will wait until the overall timeout has expired. This can be shown in a test case that has a 1 second min_wait, with a 5 second overall wait, even if an event triggers after 1.5 seconds: axboe@m2max-kvm /d/iouring-mre (master)> zig-out/bin/iouring info: MIN_TIMEOUT supported: true, features: 0x3ffff info: Testing: min_wait=1000ms, timeout=5s, wait_nr=4 info: 1 cqes in 5000.2ms where the expected result should be: axboe@m2max-kvm /d/iouring-mre (master)> zig-out/bin/iouring info: MIN_TIMEOUT supported: true, features: 0x3ffff info: Testing: min_wait=1000ms, timeout=5s, wait_nr=4 info: 1 cqes in 1500.3ms When the min_wait timeout triggers, reset the number of completions needed to wake the task. This should ensure that any future events will wake the task, regardless of how many events it originally wanted to wait for. Reported-by: Tip ten Brink <tip(a)tenbrinkmeijs.com> Cc: stable(a)vger.kernel.org Fixes: 1100c4a2656d ("io_uring: add support for batch wait timeout") Link: https://github.com/axboe/liburing/issues/1477 Signed-off-by: Jens Axboe <axboe(a)kernel.dk> diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 5d130c578435..6cb24cdf8e68 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -2536,6 +2536,9 @@ static enum hrtimer_restart io_cqring_min_timer_wakeup(struct hrtimer *timer) goto out_wake; } + /* any generated CQE posted past this time should wake us up */ + iowq->cq_tail = iowq->cq_min_tail; + hrtimer_update_function(&iowq->t, io_cqring_timer_wakeup); hrtimer_set_expires(timer, iowq->timeout); return HRTIMER_RESTART;

1 week, 1 day

FAILED: patch "[PATCH] io_uring/poll: correctly handle io_poll_add() return value on" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 84230ad2d2afbf0c44c32967e525c0ad92e26b4e # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025122905-unused-cash-520e@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 84230ad2d2afbf0c44c32967e525c0ad92e26b4e Mon Sep 17 00:00:00 2001 From: Jens Axboe <axboe(a)kernel.dk> Date: Mon, 1 Dec 2025 13:25:22 -0700 Subject: [PATCH] io_uring/poll: correctly handle io_poll_add() return value on update When the core of io_uring was updated to handle completions consistently and with fixed return codes, the POLL_REMOVE opcode with updates got slightly broken. If a POLL_ADD is pending and then POLL_REMOVE is used to update the events of that request, if that update causes the POLL_ADD to now trigger, then that completion is lost and a CQE is never posted. Additionally, ensure that if an update does cause an existing POLL_ADD to complete, that the completion value isn't always overwritten with -ECANCELED. For that case, whatever io_poll_add() set the value to should just be retained. Cc: stable(a)vger.kernel.org Fixes: 97b388d70b53 ("io_uring: handle completions in the core") Reported-by: syzbot+641eec6b7af1f62f2b99(a)syzkaller.appspotmail.com Tested-by: syzbot+641eec6b7af1f62f2b99(a)syzkaller.appspotmail.com Signed-off-by: Jens Axboe <axboe(a)kernel.dk> diff --git a/io_uring/poll.c b/io_uring/poll.c index 8aa4e3a31e73..3f1d716dcfab 100644 --- a/io_uring/poll.c +++ b/io_uring/poll.c @@ -937,12 +937,17 @@ int io_poll_remove(struct io_kiocb *req, unsigned int issue_flags) ret2 = io_poll_add(preq, issue_flags & ~IO_URING_F_UNLOCKED); /* successfully updated, don't complete poll request */ - if (!ret2 || ret2 == -EIOCBQUEUED) + if (ret2 == IOU_ISSUE_SKIP_COMPLETE) goto out; + /* request completed as part of the update, complete it */ + else if (ret2 == IOU_COMPLETE) + goto complete; } - req_set_fail(preq); io_req_set_res(preq, -ECANCELED, 0); +complete: + if (preq->cqe.res < 0) + req_set_fail(preq); preq->io_task_work.func = io_req_task_complete; io_req_task_work_add(preq); out:

1 week, 1 day

[PATCH] scsi: esas2r: fix a resource leak in esas2r_resume()

by Haoxiang Li

Add esas2r_unmap_regions() to release the resources allocated by esas2r_map_regions() in some error paths. Found by code review and compiled on ubuntu 20.04. Fixes: 26780d9e12ed ("[SCSI] esas2r: ATTO Technology ExpressSAS 6G SAS/SATA RAID Adapter Driver") Cc: stable(a)vger.kernel.org Signed-off-by: Haoxiang Li <lihaoxiang(a)isrc.iscas.ac.cn> --- drivers/scsi/esas2r/esas2r_init.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/esas2r/esas2r_init.c b/drivers/scsi/esas2r/esas2r_init.c index 04a07fe57be2..114239373f28 100644 --- a/drivers/scsi/esas2r/esas2r_init.c +++ b/drivers/scsi/esas2r/esas2r_init.c @@ -684,7 +684,7 @@ static int __maybe_unused esas2r_resume(struct device *dev) if (!esas2r_power_up(a, true)) { esas2r_debug("yikes, esas2r_power_up failed"); rez = -ENOMEM; - goto error_exit; + goto error_unmap; } esas2r_claim_interrupts(a); @@ -700,9 +700,11 @@ static int __maybe_unused esas2r_resume(struct device *dev) esas2r_debug("yikes, unable to claim IRQ"); esas2r_log(ESAS2R_LOG_CRIT, "could not re-claim IRQ!"); rez = -ENOMEM; - goto error_exit; + goto error_unmap; } +error_unmap: + esas2r_unmap_regions(a); error_exit: esas2r_log_dev(ESAS2R_LOG_CRIT, dev, "esas2r_resume(): %d", rez); -- 2.25.1

1 week, 1 day

FAILED: patch "[PATCH] io_uring: fix filename leak in __io_openat_prep()" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x b14fad555302a2104948feaff70503b64c80ac01 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025122931-primer-motivate-1780@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From b14fad555302a2104948feaff70503b64c80ac01 Mon Sep 17 00:00:00 2001 From: Prithvi Tambewagh <activprithvi(a)gmail.com> Date: Thu, 25 Dec 2025 12:58:29 +0530 Subject: [PATCH] io_uring: fix filename leak in __io_openat_prep() __io_openat_prep() allocates a struct filename using getname(). However, for the condition of the file being installed in the fixed file table as well as having O_CLOEXEC flag set, the function returns early. At that point, the request doesn't have REQ_F_NEED_CLEANUP flag set. Due to this, the memory for the newly allocated struct filename is not cleaned up, causing a memory leak. Fix this by setting the REQ_F_NEED_CLEANUP for the request just after the successful getname() call, so that when the request is torn down, the filename will be cleaned up, along with other resources needing cleanup. Reported-by: syzbot+00e61c43eb5e4740438f(a)syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=00e61c43eb5e4740438f Tested-by: syzbot+00e61c43eb5e4740438f(a)syzkaller.appspotmail.com Cc: stable(a)vger.kernel.org Signed-off-by: Prithvi Tambewagh <activprithvi(a)gmail.com> Fixes: b9445598d8c6 ("io_uring: openat directly into fixed fd table") Signed-off-by: Jens Axboe <axboe(a)kernel.dk> diff --git a/io_uring/openclose.c b/io_uring/openclose.c index bfeb91b31bba..15dde9bd6ff6 100644 --- a/io_uring/openclose.c +++ b/io_uring/openclose.c @@ -73,13 +73,13 @@ static int __io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe open->filename = NULL; return ret; } + req->flags |= REQ_F_NEED_CLEANUP; open->file_slot = READ_ONCE(sqe->file_index); if (open->file_slot && (open->how.flags & O_CLOEXEC)) return -EINVAL; open->nofile = rlimit(RLIMIT_NOFILE); - req->flags |= REQ_F_NEED_CLEANUP; if (io_openat_force_async(open)) req->flags |= REQ_F_FORCE_ASYNC; return 0;

1 week, 1 day

[PATCH] mfd: omap-usb-host: fix OF populate on driver rebind

by Johan Hovold

Since commit c6e126de43e7 ("of: Keep track of populated platform devices") child devices will not be created by of_platform_populate() if the devices had previously been deregistered individually so that the OF_POPULATED flag is still set in the corresponding OF nodes. Switch to using of_platform_depopulate() instead of open coding so that the child devices are created if the driver is rebound. Fixes: c6e126de43e7 ("of: Keep track of populated platform devices") Cc: stable(a)vger.kernel.org # 3.16 Signed-off-by: Johan Hovold <johan(a)kernel.org> --- drivers/mfd/omap-usb-host.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c index a77b6fc790f2..4d29a6e2ed87 100644 --- a/drivers/mfd/omap-usb-host.c +++ b/drivers/mfd/omap-usb-host.c @@ -819,8 +819,10 @@ static void usbhs_omap_remove(struct platform_device *pdev) { pm_runtime_disable(&pdev->dev); - /* remove children */ - device_for_each_child(&pdev->dev, NULL, usbhs_omap_remove_child); + if (pdev->dev.of_node) + of_platform_depopulate(&pdev->dev); + else + device_for_each_child(&pdev->dev, NULL, usbhs_omap_remove_child); } static const struct dev_pm_ops usbhsomap_dev_pm_ops = { -- 2.51.2

1 week, 1 day

[PATCH] bus: omap-ocp2scp: fix OF populate on driver rebind

by Johan Hovold

Since commit c6e126de43e7 ("of: Keep track of populated platform devices") child devices will not be created by of_platform_populate() if the devices had previously been deregistered individually so that the OF_POPULATED flag is still set in the corresponding OF nodes. Switch to using of_platform_depopulate() instead of open coding so that the child devices are created if the driver is rebound. Fixes: c6e126de43e7 ("of: Keep track of populated platform devices") Cc: stable(a)vger.kernel.org # 3.16 Signed-off-by: Johan Hovold <johan(a)kernel.org> --- drivers/bus/omap-ocp2scp.c | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-) diff --git a/drivers/bus/omap-ocp2scp.c b/drivers/bus/omap-ocp2scp.c index e4dfda7b3b10..eee5ad191ea9 100644 --- a/drivers/bus/omap-ocp2scp.c +++ b/drivers/bus/omap-ocp2scp.c @@ -17,15 +17,6 @@ #define OCP2SCP_TIMING 0x18 #define SYNC2_MASK 0xf -static int ocp2scp_remove_devices(struct device *dev, void *c) -{ - struct platform_device *pdev = to_platform_device(dev); - - platform_device_unregister(pdev); - - return 0; -} - static int omap_ocp2scp_probe(struct platform_device *pdev) { int ret; @@ -79,7 +70,7 @@ static int omap_ocp2scp_probe(struct platform_device *pdev) pm_runtime_disable(&pdev->dev); err0: - device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices); + of_platform_depopulate(&pdev->dev); return ret; } @@ -87,7 +78,7 @@ static int omap_ocp2scp_probe(struct platform_device *pdev) static void omap_ocp2scp_remove(struct platform_device *pdev) { pm_runtime_disable(&pdev->dev); - device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices); + of_platform_depopulate(&pdev->dev); } #ifdef CONFIG_OF -- 2.51.2

1 week, 1 day

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